COG
Elastomer seals that are used in valves, pipelines, fittings or pig traps have to face exceptionally high requirements. A sudden decrease in pressure can lead to damage of the sealing, a phenomenon known as explosive decompression. The elastomer material is either torn in various places or has blistering on the surface (photo). Only high-tech sealing compounds that are especially tested and designed with very good physical properties can be used in this situation. This company has developed seven different high-tech compounds that were intensively tested and are resistant against explosive decompression. All of these seven high-tech compounds fulfill the NORSOK Standard M-710 requirements for resistance against explosive decompression. Furthermore, some of the compounds fulfil the API 6A and 6D standard, as well as the NACE TM 0297 (Explosive decompression) and TM 0187 (sour gas) standards. — C. Otto Gehrckens (COG) GmbH & Co. KG, Pinneberg, Germany